fixed connection read to count data from multiple buckets correctly
fixed connection read to count data from multiple buckets correctly

r4-keisuke/mod_h2,r4-keisuke/mod_h2,icing/mod_h2,icing/mod_h2,icing/mod_h2,icing/mod_h2,r4-keisuke/mod_h2,r4-keisuke/mod_h2,r4-keisuke/mod_h2,icing/mod_h2,r4-keisuke/mod_h2